% This is a .sty file for the Quarterly Journal of Economics' 
% style requirements. This is the second version of the style
% file, dated June 2006. I wrote the first version for Ilya
% Segal in 1998. I provide the file with no guarantee.
% Federico Echenique

\typeout{Style modifications for Quarterly Journal of Economics}


%% Equation numbers on the left:
% it's best to use \usepackage[leqno}{amsmath}
% use the following only if unavoidable:
%\input{leqno.clo}
% but it may not work


% Environments that may not be defined :

\@ifundefined{condition}{\newtheorem{condition}{Condition}}{}
\@ifundefined{assumption}{\newtheorem{assumption}{Assumption}}{}
\@ifundefined{theorem}{\newtheorem{theorem}{Theorem}}{}
\@ifundefined{proposition}{\newtheorem{proposition}{Proposition}}{}
\@ifundefined{definition}{\newtheorem{definition}{Definition}}{}
\@ifundefined{lemma}{\newtheorem{lemma}{Lemma}}{}
\@ifundefined{examples}{\newtheorem{examples}{Examples}}{}
\newtheorem{theoremaux}{Theorem}
\newtheorem{propositionaux}{Theorem}
\newtheorem{lemmaaux}{Theorem}
\newtheorem{myappendix}{Theorem}

% Change figures and tables headings to roman numerals.

\renewcommand{\thefigure}{\Roman{figure}}
\renewcommand{\thetable}{\Roman{table}}


% Setting counters :

\setcounter{myappendix}{0}
\setcounter{propositionaux}{0}
\setcounter{lemmaaux}{0}
\setcounter{theoremaux}{0}

% New Environments :
% Need to be careful with footnotes in these environments since the
% minipage forces them to be inside the page. Hence it is needed to
% use \footnotemark and \footnotetext to separate the foonote.

\renewenvironment{proposition}{ \refstepcounter{theorem}
\begin{flushleft}{\bf Proposition \theproposition } \\ 
\end{flushleft} \begin{flushright}
 \begin{minipage}{6.21in} } {\end{minipage} \end{flushright}
\stepcounter{theoremaux} \vspace{.1in} }



\renewenvironment{lemma}{ \refstepcounter{theorem}
\begin{flushleft} {\bf Lemma \thelemma} \\ \end{flushleft}
\begin{flushright}  \begin{minipage}{6.21in} } 
{ \end{minipage} \end{flushright} 
\stepcounter{theoremaux} \vspace{.1in} }


\newenvironment{optionlemma}[1]{ \refstepcounter{theorem}
\begin{flushleft} {\bf Lemma \thelemma \hspace{1em} (#1)} \\ \end{flushleft}
\begin{flushright}  \begin{minipage}{6.21in} } 
{ \end{minipage} \end{flushright} \stepcounter{theoremaux} \vspace{.1in} }


\renewenvironment{definition}{
\refstepcounter{theorem}
\begin{flushleft} {\bf Definition \thedefinition} \\ \end{flushleft}
\begin{flushright}  \begin{minipage}{6.21in} } 
{ \end{minipage} \end{flushright}  \vspace{.1in} }

\renewenvironment{theorem}{
\refstepcounter{theorem}
\begin{flushleft} {\bf Theorem \thetheorem} \\ \end{flushleft}
\begin{flushright}  \begin{minipage}{6.21in} } 
{ \end{minipage} \end{flushright}
\addtocounter{theoremaux}{1} \vspace{.1in}}

\renewenvironment{example}{
\refstepcounter{theorem}
{\noindent \bf Example \theexample}  } {\vspace{.1in}}

\renewenvironment{assumption}{
\refstepcounter{theorem}
\begin{flushleft} {\bf Assumption \theassumption} \\ \end{flushleft}
\begin{flushright}  \begin{minipage}{6.21in} } 
{ \end{minipage} \end{flushright}   \vspace{.1in} }


% Defining the proof commands

\@ifundefined{proof}{\def\proof{\noindent{\underline {Proof.}\\ }}}{}

\@ifundefined{theoremproof}{\def\theoremproof{\noindent{\underline {Proof
        of Theorem \thetheoremaux .} \\ }}}{}

\@ifundefined{propositionproof}{\def\propositionproof{\noindent{
      \underline{Proof of Proposition \thepropositionaux . } \\ }}}{}

\@ifundefined{lemmaproof}{\def\lemmaproof{\noindent{\underline {Proof of
        Lemma \thelemmaaux. }\\ }}}{}

\newcommand{\optionproof}[2]{\noindent \underline{Proof of #1 #2.} \\ }


% Style on counters




\renewcommand{\thesection}{\Roman{section}}  % This command changes the
                                              % numbering of sections to
                                              % roman


\renewcommand{\thesubsection}{\Alph{subsection}} % This command changes the
                                                  % numbering of subsections to
                                                  % Alphabetic


\renewcommand\thesubsubsection{\thesubsection .\@arabic\c@subsubsection}

\renewcommand{\themyappendix}{\arabic{myappendix}}
                                               


\renewcommand\section{% 
\@startsection {section}{1}{\z@}%
{-3.5ex \@plus -1ex \@minus -.2ex}%
{2.3ex \@plus.2ex}
 { \centering \normalfont\Large\bfseries} } % This changes the
                                            % definition of the
                                            % \section command so that
                                            % the headings are centered


\renewcommand\subsection{%
\@startsection{subsection}{2}{\z@}%
                                     {-3.25ex\@plus -1ex \@minus -.2ex}%
                                     {1.5ex \@plus .2ex}%
                                     {\flushleft \normalfont \underline}}
% This changes the
% definition of the
% \subsection command so that
% the headings are flush left and underlined

\renewcommand\subsubsection{%
\@startsection{subsubsection}{3}{\z@}%
                                     {-3.25ex\@plus -1ex \@minus -.2ex}%
                                     {1.5ex \@plus .2ex}%
                                     {\flushleft \normalfont\large \underline}}
% This changes the
% definition of the
% \subsubsection command so that
% the headings are flush left and underlined



% Redefining the \appendix command :

\renewcommand{\appendix}[1]{\refstepcounter{myappendix}
 {\centering \Large\bf Appendix \themyappendix $\;$  #1} 
 \renewcommand{\thelemmaaux}{A.\arabic{lemmaaux}}
 \renewcommand{\thelemma}{A.\arabic{lemma}} 
 \renewcommand{\thepropositionaux}{A.\arabic{propositionaux}}
 \renewcommand{\theproposition}{A.\arabic{proposition}} }

% Adding space to the footnotes : --------------
% THIS IS APPARENTLY NO LONGER NEEDED:
%\renewcommand{\@makefnmark}{\hbox{\kern0.75\p@\@textsuperscript
%    {\tiny{\@thefnmark}}}}
%\renewcommand{\@makefntext}[1]{%
%  \parindent 1em
%  \noindent % \hbox to 5em{}% %\hspace{5em} 
%  \@thefnmark. \hspace{3em}  #1}

% Change in References

\setlength\bibindent{0em}
\renewenvironment{thebibliography}[1]
     {\section{\refname
        \@mkboth{\MakeUppercase\refname}{\MakeUppercase\refname}}%
      \list{} % {\@biblabel{\@arabic\c@enumiv}}%
           %{\settowidth\labelwidth{-1em}%
            {\settowidth\labelwidth{\@biblabel{#1}}  
            \leftmargin\labelwidth
            \advance\leftmargin\labelsep
            \@openbib@code
            \usecounter{enumiv}%
            \let\p@enumiv\@empty
            \renewcommand\theenumiv{\@arabic\c@enumiv}}%
      \sloppy\clubpenalty4000\widowpenalty4000%
      \sfcode`\.\@m}
     {\def\@noitemerr
       {\@latex@warning{Empty `thebibliography' environment}}%
      \endlist}